/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

import {zoneSymbol} from '../../lib/common/utils';
import {asyncTest, ifEnvSupports} from '../test-util';

function workerSupport() {
  const Worker = (window as any)['Worker'];
  if (!Worker) {
    return false;
  }
  const desc = Object.getOwnPropertyDescriptor(Worker.prototype, 'onmessage');
  if (!desc || !desc.configurable) {
    return false;
  }
  return true;
}

(workerSupport as any).message = 'Worker Support';

describe('Worker API', ifEnvSupports(workerSupport, function() {
           it('Worker API should be patched by Zone', asyncTest((done: Function) => {
                const zone: Zone = Zone.current.fork({name: 'worker'});
                zone.run(() => {
                  const worker = new Worker('/base/test/assets/worker.js');
                  worker.onmessage = function(evt: MessageEvent) {
                    expect(evt.data).toEqual('worker');
                    expect(Zone.current.name).toEqual('worker');
                    done();
                  };
                });
              }, Zone.root));
         }));
